@article{yang2020deconfounded,
  title={Deconfounded image captioning: A causal retrospect},
  author={Yang, Xu and Zhang, Hanwang and Cai, Jianfei},
  journal={arXiv preprint arXiv:2003.03923},
  year={2020},
  url={https://arxiv.org/pdf/2003.03923}
}